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Finding the Third Proportional to 384.50 and 730.75

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Solution

The third proportional to 384.50 and 730.75 is: 1,388.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.50 : 730.75 = 730.75 : x
  2. Step 2: Convert to fraction form
    384.50/730.75 = 730.75/x
  3. Step 3: Cross multiply
    384.50x = 730.75 × 730.75
  4. Step 4: Simplify right side
    384.50x = 533,995.56
  5. Step 5: Solve for x
    x = 533,995.56/384.50
  6. Step 6: Final answer
    x = 1,388.81

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.